Is there a way to change more than one document at a time to/from script mode?
No there isn’t, but it’s pretty easy to go down a list with Ctrl-4 and the down arrow key.
I’ve got a hundred or so, and they are not consecutive. What I thought I’d be able to do was to make a collection of them (using keywords as filters) and then change them altogether, maybe in outline view in the same way you can change labels or status. One for the wishlist, I guess.